Window ventilator



W. H. MAYNARD WINDOW VENTILATOR 1 Dec. 29, 1936.

Original Filed 001;. 11, 1934 UNITED STATES mans WINDOW VENTILATOR William H. Maynard, Winooski, Vt., assignor to Porter Screen Company, Winooski, Vt., a corporation of Vermont Original application October 11, 1934, Serial No. 747,908. Divided and this application July 19,

1935, Serial No. 32,204

tudinal frame elements l2-l2 with atransverse frame element I3 at its outer end. Each section holds a paneof glass 21 so that the ventilator 3 Claims.

My invention relates to extensible window ventilators and more particularly to novel and efficient means for removably supporting such ventilators in a window opening, this application being a division of my copending application Serial No. 747,908, filed October 11, 1934, now matured into Patent No. 2,014,974.

An adjustable window ventilator of the type illustrated in Fig. 1 of the accompanying drawing is disclosed and described in my Patent No. 2,014,454, application for which was filed October 6, 1933. Such a ventilator comprises two connected sliding sections which are arranged for relative movement so that the structure may be extended or collapsed to fit any size window or opening, and when not in use the structure may be entirely collapsed for storage. It is desirable to provide means for supporting such a ventilator in an opening so that it will not and can not be accidentally collapsed to fall away from its supporting means.

The principal object of my invention is to pro vide supporting means adapted to prevent accidental collapsing of the sliding sections of an extensible window Ventilator.

A further object of my invention is to provide supporting means adapted to prevent accidental collapsing of an extensible ventilator and also adapted to permit the ventilator to be removed from the window or other opening when not in use.

A further object is to provide supporting means for an extensible window ventilator.

Other objects relate to the construction and mode of operation and will be apparent from a consideration of the following description and the accompanying drawing which exemplifies different embodiments chosen for the purpose of illustration.

In the drawing:

Fig. 1 is a perspective View of an extensible window ventilator and one form of supporting means embodying my invention;

Fig. 2 is an enlarged section taken on the line 2--2 of Fig. 1, with parts broken away;

Fig. 3 is a sectional view similar to Fig. 2, but showing another embodiment of supporting means with parts broken away; and

Fig. 4 is an enlarged section taken on the line 44 of Fig. 1.

In the embodiment herein shown for the purpose of illustration the extensible ventilator is comprised of two relatively movable sections Ill and II in sliding face-to-face relation. The frame of each section is formed of two longiwill not exclude light from the room. The inner faces of the longitudinal frame elements l2-l2 are each provided with undercut grooves i l (see Figs. 1 and 4).

The two sections of the ventilator are slidably secured to each other by means of a stud [5 (see Fig. l), one end of which is firmly secured frame element of the other section. Ordinarily y at least four such studs are used, one near each end ofeach longitudinal frame element of. one section. A ventilator thus assembled provides an efiicient, easily operable extensible structure.

A pair of end-supporting members or endplates l'l are firmly secured by means of screws 18 to the inner sides IQ of. the window casing with their lower ends resting on the windowsill 29. 'Only one of these supporting members is shown in Fig. 1 since only part of the window is shown.

A longitudinal undercut groove 28 is provided on the outer face of each of the transverse frame elements l3 of each ventilator section.

In the embodiment illustrated in Figs. 1 and 2 of the drawing, a dovetail shaped connecting member 24- is provided on the inner face of each end-supporting member ll. These connecting members are of such a cross section that they will freely slide in the respective adjacent longitudinal undercut grooves 28.

In the embodiment illustrated in Fig. 3 of the drawing, a stud 50, having an outstanding enlarged head 5|, is secured to the inner face of each end-supporting member. The enlarged heads 5! of the studs are of such a size that they will freely slide in the respective adjacent longitudinal undercut grooves 28. Preferably two or more of such enlarged headed studs are secured to the inner faces of each end-supporting member.

In operation the end-supporting members I! are fastened to the inner faces l9 of the window frame. The ventilator is extended or collapsed to fit the width of the particular window in which it is to be used, and the connecting members 2 3 or 59 and 5| are then started in the lower ends of the respective adjacent longitudinal undercut grooves 28 of the transverse frame elements it; the ventilator is then slowly guided g the transverse frame elements l3 and cooperate into place until the lower edge thereof rests upon the window-sill 20, the connecting members during this operation sliding within said longitudinal undercut grooves. In the final position the dovetail shaped connecting. members 24 or the enlarged heads 5| of. the studs are located within the longitudinal'undercut grooves 28 of the window 23 is directed inwardly and'upwardly over the ventilator into the room.

The present disclosure isfor the purpose of illustration only, and this invention includes all modifications and equivalents, which fall within the scope of the appended claims.

I claim:

1. An extensible end plates for attachment in face-to-face relationshipwith the inner sides of a window casing, two relatively movable sections. in sliding faceto-face relation bridging the space between-said plates, said sections comprising side and end frame members fast together at the corners, the outer end frame member of each section having an undercut groove in its outer end face forming overhanging lips therein, said undercut groove extending longitudinally of said outer end face and between and substantially parallel to the planes of the side facesof said outer end frame member, each of said end plates having a connecting member extending from the face thereof adjacent the outer end of the adjoining ventilator section, said connecting member having enlarged portions adjacent said free end, said enlarged portions being adapted to slide in theundercut grooveof the adjacent ventilator section and to 'slidably engage the respective adjacent inner.

faces of the overhanging lips of said undercut groove. 7

2. An extensible window ventilator comprising end plates for attachment in fac'e-to-facerelawindow ventilator comprisingtionship with the inner sides of a window casing, two relatively movable sections in sliding faceto-face relation bridging the space between said plates, said sectionscomprising side and end frame members fast together at the corners, the

outer end frame member of each section having an undercut groove in its outer end face forming overhanging lips therein, said undercut groove extending longitudinally of said outer end face and between and substantially parallel to the planes of the side faces of said outer end frame member, each of said end plates having a dovetail shapedconnecting member extending from the face thereofadjacent the outer end of the adjoining ventilator section, the dove-tail wings of said connecting member being adapted to slide inthe undercut groove of the adjacent ventilator section and to slidably engage the respective adjacent inner faces of the overhanging lips of said undercut groove.

3. An extensible window ventilator comprising end plates for attachment in face-to-face relationship withthe inner sides of a window casing, two relatively movablev sections in sliding face-to-face relation bridging the space between said plates, said sections comprising side and adjacent ventilator section, and to slidably engage the respective adjacent inner faces 'of the overhanging lips of said undercut groove.

WILLIAM H. MAYNARD. 

